An improved encoding and decoding method for the transmission and estimation of multiple simultaneous channels, thereby solving the problem of shortening the time required to measure the attenuation, absorption or distortion of signals passing through a predetermined medium.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method of identifying a transmission channel, the method comprising the steps of: assigning to each of P transmitters a set of orthogonal complementary sequences; operating the P transmitters during a first time period to transmit simultaneously through the transmission channel a first sequence of each of the sets of orthogonal complementary sequences; operating the P transmitters during a second time period following the first time period to transmit simultaneously through the transmission channel a second sequence of each of the sets of orthogonal complementary sequences; repeatedly operating the P transmitters during each of a number of subsequent time periods following the second time period to transmit simultaneously through the transmission channel P subsequent sequences during each subsequent time period until P sequences of Q sets of orthogonal complementary sequences are transmitted through the transmission channel; operating Q receivers during the time periods to receive the transmitted orthogonal complementary sequences; and identifying the transmission channel based on the received transmitted orthogonal complementary sequences, wherein each of P and Q is an integer, wherein P is greater than two and Q is greater than 2, wherein the step of identifying the transmission channel based on the received transmitted orthogonal complementary, sequences comprises the step of identifying parameters of a transference matrix hp,q in accordance with the following equation: M · h p , q = ∑ k = 1 M r q ( k ⊗ s p , k ; 1 ≤ p ≤ P ; 1 ≤ q ≤ Q wherein h pq is the transference matrix, M is the number of orthogonal complementary sequence sets, r q (k is the signal received at receiver q at time interval T k , and S p,k is the K-th sequence of orthogonal complementary sequence set S p .
2. The method of claim 1 , wherein each of the orthogonal complementary sequences is comprised of elements +1 and −1.
3. The method of claim 1 , wherein each of the orthogonal complementary sequences is comprised only of elements +1 and −1.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
November 24, 2008
August 6, 2013
Browse 5M+ US patents with plain-English claim translations and AI-generated analysis.